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简支梁桥各墩在强震时纵向水平地震振动表现了单墩独立的振动特性,可以把简支梁桥在强震作用下的地震振动简化为单墩单梁模型来模拟。笔者对柔性桥墩的简支梁桥采用单墩单梁模型进行了纵向水平随机地震反应分析和抗震可靠度的计算。柔性桥墩的简支梁桥在强震作用下简化为单墩单梁模型,受力过程明确,计算得到大大简化,对柔性桥墩的简支梁桥在地震作用下的安全可靠性的评估具有一定的实用价值。
The vertical horizontal seismic vibrations of each pier of a simply supported girder bridge show the independent vibration characteristics of the single pier when the strong earthquakes. The seismic vibrations of the simply supported girder bridge under the action of strong earthquakes can be simplified as single-pier single-beam model to simulate. The author uses the single pier single beam model to analyze the longitudinal horizontal random seismic response and the calculation of seismic reliability of the simply supported flexible girder bridge with flexible piers. The simple supported girder bridge with flexible piers is simplified as single-pier single-girder model under the action of strong earthquake. The stress process is clear and the calculation is greatly simplified. The evaluation of the safety and reliability of the flexible girder bridge with flexible piers under earthquake action has certain The practical value.